Hat pin



FIG. 1 is a top back side perspective view of a hat pin, showing my newdesign;

FIG. 2 is a back side elevation view thereof;

FIG. 3 is a front side elevation view thereof;

FIG. 4 is a left side elevation view with the right side elevation viewbeing a mirror image thereof;

FIG. 5 is a top side plan view thereof; and,

FIG. 6 is a bottom side plan view thereof.

CLAIM The ornamental design for a hat pin, as shown and described.